Insulator



H. W. STEINBERG, Jr. INSULATOR.

Patented July .13, 1 897.

UNITED STATES PATENT OEEicE.

HENRY IV. STEINBERG, JR, OF IVALLA KVALLA, WASHINGTON.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 586,372, dated July 13,1897.

A li ti fil d December 8, 1896. Serial No. 614,872. (No model.)

7'0 all whom z t may concern/.-

Be it known that I, HENRY W. STEINLBEEG, JR, a citizen of the UnitedStates, residing at \Valla Walla, in the county of Valla alia andStateof ashington, have invented certain new and useful Improvements inInsulators; and I do hereby declare the following to be a full, clear,and eiraot description of theinvcntion, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements ininsulators for telegraph and telephone wires, the object of the samebeing to provide an insulator in which the wire may be readily insertedand removed, in which the same is securely held in place, and in whichslipping and sagging of the linewire are prevented.

The invention consists of a block of glass, wood, or other insulatingmaterial, having a screw cast or otherwise formed in the lower endthereof, by means of which said block may be attached to the cross-treeof the telegraph-pole, the said block having a slot in its upper end inwhich the line-wire is adapted to fit, the said slot having a centralcurved portion and straight extensions leading outwardly therefrom and alaterally-extending opening in said block in which a securingwire isadapted to be passed, the said opening extending through the slot insaid block at a point just above the lower end thereof.

The invention also consists in other details of construction andcombinations of parts which will be hereinafter more fully described andclaimed.

In the drawings forming a part of this specification, Figure 1represents a perspective view of a telegraph-pole with a series of myinsulators shown attached to the crosstree thereof. Fig. 2 is a sideelevation of the insulator with the laterally-extending opening thereinshown in dotted lines. Fig. 3 is a vertical longitudinal section throughthe line so at, Fig. 4. Fig. 4 is a top plan view, and Fig. 5 is across-section, on the line X X of 'Fig. 3.

Like reference-numerals indicate like parts in the different views.

My improved insulator is made up of a block 1, preferably polygonal incross-section in order that it may receive a wrench, and constructed ofglass orother suitable insulating material. In itslower end is cast orotherwise formed a screw 2, having a rectangular or irregularly shapedhead 3 for prevent ing the independent turning of said screw. The lowerend thereof projects outwardly from the lower end of the block 1 and isadapted to be screwed into the crosstree 4 of the telegraph-pole. In theupper end of the block 1 is formed a slit 5, which extends down to apoint adjacent to the center of said block and is formed with a centralcurved portion 6 and straight outer ends '7 7, which lie in direct lineone with the other. In this slit the line wire 8 is adapted to beinserted, the same being slightly bent or crimped in order to conform tothe shape of said slit. \Vhen seated, it fits within the lower end ofsaid slit. The block 1 is further provided with a laterally-extendingslot or opening 9, which extends through the slit 5 at a point justabove the lower end thereof, as clearly shown in Fig. 3 of the drawings.In this opening a short securin g-wire 10 is adapted to be passed forholding the line-wire 8 in place and pre venting its accidental removal.The ends of the securing-wire 10 may be bent around the outer ends ofthe opening 9, so that it cannot slip out of the same itself.

As thus constructed, it will be seen that I have devised an extremelysimple insulator, in which a telegraph or telephone wire may be readilyinserted and removed and which by reason of the shape of the slit inwhich said line-wire fits prevents all slipping or sagging of saidline-wire. The securing-wire 10 when in place lies directly above thelinewire 8 and prevents any upward movement of the latter.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. An insulator for telegraph and other wires, consisting of a block ofglass or other insulating material, a screw cast or otherwise secured insaid block by means of which the same may be attached to a suitablesupport, the said block being further provided with anirregularly-shaped slit in its upper end in which the line-wire isadapted to fit, and with an opening extending laterally through saidblock and passing through said slit at a point just above its lower end,and a securing-wire fitting within said opening, substantially as andfor the purpose described.

2. An insulator for telegraph and other wires, consisting of a block ofglass or other suitable insulating material, a screw having a polygonalor irregularly shaped head cast or otherwise secured in the lower end ofsaid block and projecting outwardly therefrom, by means of which thesame maybe attached to a suitable support, the said block being furtherprovided with a slit in its upper end which terminates at a pointadjacent to the longitudinal center of said block and is formed withaeentral curved portion with outwardly-

